3.3 ± 0.2
(.130 ± .008)
3.5 ± 0.2
(.138 ± .008)
2.8 ± 0.2
(.110 ± .008)
TYP.
TYP.
0.5
(.020)
TYP.
2.30
(.091)
0.5
(.020)
TYP.
1.1
(.043)
10 0
4.2
(.165)
1.8
(.071)
REF.
REF.
REF.
1.3
(.051)
REF.
1.2
(.047)
Flux Density Bp-p (gauss)
100
1000
10
100 1000
1 MHz
500 KHz
300 KHz
200 KHz
100 KHz
50 KHz
10000
1
0.1
0.01
Core Loss (mW)
Features
■ Available in E6 series
■ Unit height of 2.8 mm
■ Current up to 0.72 A
■ RoHS compliant*
Applications
■ Input/output of DC/DC converters
■ Power supplies for:
• Portable communication equipment
• Camcorders
• LCD TVs
• Car radios
SRU3028 Series - Shielded SMD Power Inductors
Electrical Specifi cations
Product Dimensions
Recommended Layout
DIMENSIONS:
MM
(INCHES)
* RoHS Directive 2002/95/EC Jan. 27, 2003 including annex and RoHS Recast 2011/65/EU June 8, 2011.
Specifi cations are subject to change without notice.
The device characteristics and parameters in this data sheet can and do vary in different applications and actual device
performance may vary over time.
Users should verify actual device performance in their specifi c applications.
Electrical Schematic
Inductor Connection
Bourns
Part Number
Inductance
@ 100 KHz
Q
Ref.
Test
Freq.
(MHz)
SRF
Typ.
(MHz)
RDC
(mΩ)
I rms
Max.
(A)
I sat
Typ.
(A)
**K-
Factor
L (µH)
Tol.
(%)
SRU3028-100Y 10.0 ±30 20 7.96 35 160 0.72 0.86 276
SRU3028-150Y 15.0 ±30 18 2.52 25 230 0.66 0.72 241
SRU3028-220Y 22.0 ±30 18 2.52 15 270 0.60 0.62 214
SRU3028-330Y 33.0 ±30 20 2.52 10 450 0.47 0.48 180
SRU3028-470Y 47.0 ±30 20 2.52 8 815 0.32 0.38 133
SRU3028-680Y 68.0 ±30 20 2.52 7 1400 0.24 0.28 112
SRU3028-101Y 100.0 ±30 20 0.796 5 2200 0.19 0.21 91
1
00
LCR METER
*RoHS COMPLIANT
**K-Factor: To calculate core fl ux density, Bp-p (gauss) = K x L(µH) x Δ I (peak-to-peak ripple current, A),
determine core loss from Core Loss vs. Flux Density plot.
Core Loss vs. Flux Density
Test Voltage ....................................0.1 V
Refl ow Soldering .. 230 °C, 50 sec. max.
Operating Temperature
................................-40 °C to +125 °C
(Temperature rise included)
Storage Temperature
................................-40 °C to +125 °C
Resistance to Soldering Heat
............................. +260 °C for 10 sec.
General Specifi cations
Core ....................Ferrite DR and RI core
Wire ............ Enameled copper (Class F)
Terminal ....................................Ag/Ni/Sn
Rated Current
...................Ind. drop 35 % typ. at Isat
Temperature Rise
.....................40 °C max. at rated Irms
Packaging .................... 600 pcs. per reel
Materials
